This is a note to let you know that I've just added the patch titled
net: stmmac: fix double serdes powerdown
to the 5.15-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
net-stmmac-fix-double-serdes-powerdown.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 5bcc28bce4e6233d7782ecbe68e190c4f4488ec2
Author: Bartosz Golaszewski <bartosz.golaszewski@xxxxxxxxxx>
Date: Wed Jun 21 15:55:37 2023 +0200
net: stmmac: fix double serdes powerdown
[ Upstream commit c4fc88ad2a765224a648db8ab35f125e120fe41b ]
Commit 49725ffc15fc ("net: stmmac: power up/down serdes in
stmmac_open/release") correctly added a call to the serdes_powerdown()
callback to stmmac_release() but did not remove the one from
stmmac_remove() which leads to a doubled call to serdes_powerdown().
This can lead to all kinds of problems: in the case of the qcom ethqos
driver, it caused an unbalanced regulator disable splat.
Fixes: 49725ffc15fc ("net: stmmac: power up/down serdes in stmmac_open/release")
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@xxxxxxxxxx>
Reviewed-by: Jiri Pirko <jiri@xxxxxxxxxx>
Acked-by: Junxiao Chang <junxiao.chang@xxxxxxxxx>
Reviewed-by: Andrew Halaney <ahalaney@xxxxxxxxxx>
Tested-by: Andrew Halaney <ahalaney@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20230621135537.376649-1-brgl@xxxxxxxx
Signed-off-by: Jakub Kicinski <kuba@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index 179f8d196c890..a43628dd1f4c2 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -7318,12 +7318,6 @@ int stmmac_dvr_remove(struct device *dev)
netif_carrier_off(ndev);
unregister_netdev(ndev);
- /* Serdes power down needs to happen after VLAN filter
- * is deleted that is triggered by unregister_netdev().
- */
- if (priv->plat->serdes_powerdown)
- priv->plat->serdes_powerdown(ndev, priv->plat->bsp_priv);
-
#ifdef CONFIG_DEBUG_FS
stmmac_exit_fs(ndev);
#endif
